diff --git a/c2logic/compiler.py b/c2logic/compiler.py
index 638d64a..be1d714 100644
--- a/c2logic/compiler.py
+++ b/c2logic/compiler.py
@@ -8,7 +8,7 @@ from pycparser.c_ast import (
 	Compound, Constant, DeclList, Enum, FileAST, FuncDecl, Struct, TypeDecl, Typename
 )
 
-from .consts import builtins, func_binary_ops, func_unary_ops
+from .consts import func_binary_ops, func_unary_ops
 from .instructions import (
 	Instruction,
 	Noop,
@@ -299,7 +299,7 @@ class Compiler(c_ast.NodeVisitor):
 				self.visit(node.init)
 				self.set_to_rax(varname)
 		elif isinstance(node.type, FuncDecl):
-			if node.name not in builtins + func_unary_ops + func_binary_ops:
+			if node.name not in list(PARSED_INSTRUCTIONS.keys()) + func_unary_ops + func_binary_ops:
 				#create placeholder function for forward declarations
 				func_decl = node.type
 				if func_decl.args is None or isinstance(func_decl.args.params[0], Typename):
diff --git a/c2logic/consts.py b/c2logic/consts.py
index 96f7471..9e80e92 100644
--- a/c2logic/consts.py
+++ b/c2logic/consts.py
@@ -26,7 +26,6 @@ condition_ops = {
 	">": "greaterThan",
 	">=": "greaterThanEq"
 }
-#TODO remove negate b/c its deprecated
 unary_ops = {"~": "not"}
 
 binary_op_inverses = {"==": "!=", "!=": "==", "<": ">=", "<=": ">", ">": "<=", ">=": "<"}
@@ -35,8 +34,3 @@ func_binary_ops = ["pow", "max", "min", "angle", "len", "land", "idiv", "strictE
 func_unary_ops = ["abs", "log", "log10", "sin", "cos", "tan", "floor", "ceil", "sqrt", "rand"]
 binary_ops.update(dict(zip(func_binary_ops, func_binary_ops)))
 unary_ops.update(dict(zip(func_unary_ops, func_unary_ops)))
-
-builtins = [
-	"print", "printd", "printflush", "radar", "sensor", "enable", "shoot", "get_link", "read",
-	"write", "drawflush", "end"
-]